From ff45715ce50b80ab16ee0d0dc7fff0c47a51959a Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Mon, 15 May 2006 13:47:16 -0400 Subject: [PATCH] pack-object: slightly more efficient Avoid creating a delta index for objects with maximum depth since they are not going to be used as delta base anyway. This also reduce peak memory usage slightly as the current object's delta index is not useful until the next object in the loop is considered for deltification. This saves a bit more than 1% on CPU usage. Signed-off-by: Nicolas Pitre Signed-off-by: Junio C Hamano --- delta.h | 2 ++ pack-objects.c | 15 ++++++++------- 2 files changed, 10 insertions(+), 7 deletions(-) diff --git a/delta.h b/delta.h index 727ae30e9..7b3f86d85 100644 --- a/delta.h +++ b/delta.h @@ -18,6 +18,8 @@ create_delta_index(const void *buf, unsigned long bufsize); /* * free_delta_index: free the index created by create_delta_index() + * + * Given pointer must be what create_delta_index() returned, or NULL. */ extern void free_delta_index(struct delta_index *index); diff --git a/pack-objects.c b/pack-objects.c index 526c090c6..b430b02cf 100644 --- a/pack-objects.c +++ b/pack-objects.c @@ -1105,17 +1105,14 @@ static void find_deltas(struct object_entry **list, int window, int depth) if (entry->size < 50) continue; - if (n->index) - free_delta_index(n->index); + free_delta_index(n->index); + n->index = NULL; free(n->data); n->entry = entry; n->data = read_sha1_file(entry->sha1, type, &size); if (size != entry->size) die("object %s inconsistent object length (%lu vs %lu)", sha1_to_hex(entry->sha1), size, entry->size); - n->index = create_delta_index(n->data, size); - if (!n->index) - die("out of memory"); j = window; while (--j > 0) { @@ -1135,6 +1132,11 @@ static void find_deltas(struct object_entry **list, int window, int depth) */ if (entry->delta && depth <= entry->depth) continue; + + n->index = create_delta_index(n->data, size); + if (!n->index) + die("out of memory"); + idx++; if (idx >= window) idx = 0; @@ -1144,8 +1146,7 @@ static void find_deltas(struct object_entry **list, int window, int depth) fputc('\n', stderr); for (i = 0; i < window; ++i) { - if (array[i].index) - free_delta_index(array[i].index); + free_delta_index(array[i].index); free(array[i].data); } free(array); -- 2.26.2